<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button @click="logout">退出</el-button>
        </el-header>
        <!--主体-->
        <el-container>
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                background-color="#333744"
                text-color="#fff"
                active-text-color="#409EFF"
                unique-opened
                :collapse="isCollapse"
                :collapse-transition="false"
                :router="true"
                :default-active="activePath">
                <!--一级菜单-->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                    <template slot="title">
                        <i :class="iconsObj[item.id]"></i>
                        <span>{{item.authName}}</span>
                    </template>
                    <!--二级菜单-->
                    <el-menu-item 
                    :index="'/'+ subItem.path" 
                    v-for="subItem in item.children" 
                    :key="subItem.id"
                    @click="saveNavState('/'+ subItem.path)">
                        <template slot="title">
                            <i class="el-icon-menu"></i>
                            <span>{{subItem.authName}}</span>
                        </template>
                    </el-menu-item>
                </el-submenu>
                
                </el-menu>
            </el-aside>
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
<script>
export default {
    data(){
        return{
            //左侧菜单
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            isCollapse:false,
            activePath:''
        }
    },
    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            window.sessionStorage.clear();
            this.$router.push('/login');
        },
        async getMenuList(){
            const {data:res} = await this.$http.get('menus');
            if(res.meta.status !== 200) return this.$message.error('res.meta.msg');
            this.menulist = res.data;
            //console.log(res);
        },
        toggleCollapse(){
            //切换菜单
            this.isCollapse = !this.isCollapse;
        },
        saveNavState(activePath){
            //保存链接激活
            window.localStorage.setItem('activePath', activePath);
            this.activePath = activePath
        }
    }
}
</script>
<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background: #eee;
}
.iconfont{
    margin-right:10px;
}
.toggle-button{
    background: #4a5064;
    color: #fff;
    font-size: 10px;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>